Hoover Dam was by far my favorite thing to do! It was a lot of fun. Also, Fremont street is pretty cool. Be sure to do the zip line! Cheap eats - Earl of Sandwhich. Check it out!
I had the same thoughts during my first 5k! And I have already signed up for any other 5k on July 3rd. Keep up the good work! http://meanderingmemoir.blogspot.com/2011/05/i-did-it.html